Thomas henderson



T.. HENDERSON.

(No Model.)

STEAM BOILER.

lportable steam boiler.

Nrrnn 'STATES Fries..

ATENT STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 545,075, dated August 2*?, 1895. Applicatiouled August 17,1894. Serial No. 520,573- (No model.) i

To @ZZ whom it may concern.:

Be it known that I, THOMAS HENDERSON, iron-ship builder, a subject of the Queen of Great Britain, residing at Mill Hill Road,Wav erly, near Sydney, in the British Colony of New South Wales, have invented a new and useful Steam-Boiler, entitled an Improved Tubular ySectional Steam-Boiler, of which the following is a specication.

This invention relates to an improved tubular sectional steam-boiler in which the whole, or nearly the whole, of the gases of combustion will be utilized in converting the feed-water into steam or dry steam, anddn which practically no or very little waste heat escapes into the atmosphere.

This improved tubular sectional steam boiler consists of a number of tubular sections connected rigidly end on to one another and having pipe connections from the end farther from the combustion-chamber of one section to the Aend nearer lthe combustion chamber of the section nearer to said combustion -chamber. When placed vertically one upon the other, as is preferred', the lower tubular section has an ordinary lire-box made therein, or it may sit upon a brick or other fire-box or furnace, and when placed horizontally one against the other one end section is constructed similar to a locomotive or semi- In connecting the tubular sections, one tothe other a novel construction of holding-joint is used having an internal ring, into which take stud-bolts from the outside, so as to clamp or hold both abutting sections in position; and my said invention consists7 essentially, in the construction of said holding-joint; but in order that this invention may be clearly understood reference will now be made to the drawings herewith, in which- Figure 1 is an elevation, partly in section, of an improved steamboiler constructed according thereto, the combustion-chamber or {ire-box being omitted. Fig. 2 is a section of the boiler taken just above or below a tubeplate. Fig. 3 is a plan of same. Fig. 4 is a sectional elevation of a lower tubular section containing a combustion-chamber or fire-box; and Fig. 5 is a section of a brickwork or masonry furnace on which a construction, such as that shown in Fig. 1, might rest. Fig. 6 is a detail of joint between two abutting tubular sections.

Though iive tubular. sections 1A 2A 3A LA 5A are shown, there is no restriction to the number solong as there is any heat in the escaping gases of combustion which will pass through the tubes. Each section is constructed with its cylindrical shell A riveted to iianged tube-plates B, between which tubeplates are the tubes C. On the top' of the highest section suitably supported by it is a funnel or an escape-pipe to a chimney-stack. The joint between abutting sections is made by means of internal cylindrical ring B taking against the heads A of the rivets of the sections and acting as a clamp or holding` piece screwed up tightly by means of studbolt B2, whose head takes half upon each abutting edge of the tubular sections. Pipe 1D supplies feed-water from-a pump or high-level reservoir into top section lA at its lower end. Pipe 2D joins top of section 1A to bottom of section 2% Pipe 3D connects top of section 2A to bottom of section 3A. Pipe 4.? connects top of section 3A to bottom of section 4A. Pipe 5D connects top of section 3A with bottom of section 5A. Said section. 5A is supposed to rest upon acombustion-chamber, as shown in Fig. 5, or to be replaced by combustion-section 5X, as shown in Fig. 4, in which latter event pipe 5D would connect with the lower part of the water-space of said comb ustion-'section 5X.

VPipe 6D connects the top of section 4A to the top of section 5A or to the top of the combustion-chamber 5X. Pipe E is steam-supply or service pipe to where required.

The feed-water is supplied by pipe 1D to the section 1A, and, as it extracts the heat of the gases of combustion passing upward through the tubes C of said section 1A, it moves upwardly to the pipe 2D', where the hotter part flows to section 2A, thence farther heated to section 3A, and thence-into either of the lower sections 4A or 5A, or, both, as may be desired to according to regulation of cocks or valves pro-` vided for the purpose. The two lower sections lA and 5A or as substitute for the latter the combustion-section 5 shown in Fig. 4 may be termed evaporators, while the other sections may be called water-heaters, and the ev aporators are connected by pipe 6D, so as to provide increased steam-space. It will be IOO seen that according to the number of sections used so more or less of the heat of the gases ot combustion passing through the tubes will be extracted by the Water constantly traveling in the opposite direction toward the combustion-section or tire-box or furnace.

With a horizontal construction of this innproved tubular sectional steam -boiler the gases of combustion would travel through similarly-connected tubular sections in one direction and the Water travel from the top ot' the water space of one section to the bottom of Water-space ofthe next in the opposite direction toward the combustion Section or furnace.

Having now particularly described and eX- plained the nature of my said invention and in What manner the same is to be performed, I declare that what I claim is- In a sectional tubular boiler, the combina- 2 the heads of the shell rivets and the stud 2 bolts B2 clamping said ring to the rivet heads, substantially as and for the purpose set forth.

THOS. HENDERSON. Witnesses:

FRED WALSH, THOMAS JAMES WARD. 

